barnard



A 4 sheets-sheet 2. fl

' .H. A. BARNARD.

ROLLER MILL.

(NO Model.)

NQ. 382,583. .Pat-@mamy s, .1888.,

IJV VENTOR UNITED. STATES` PATENT OFFICE.;

HEMAN A. BARNARD, or MoLINn, ILLINOIS, AssIGNoR Tov THE BARNARD a LEAs MANUFACTURING COMPANY, or sAMn PLAGE.

ROLLER-MILL."

SPECIFICATION refining pere o f Lei-.referment Ne. 382,583, aerea Mey a, Isae. Appiieetien sied october 27,- lass. Renewed Deeemter 1n, 1881. vserien Ne. 258,301. (No model.)

To a/ZZ whom it may concern.- c 1 Be it known that l, HEMA'N A. BARNARD, of Moline, in the county ofRock Island and State of Illinoisphav'e invented certain new and useful Improvements in Roller-Mills; and I do hereby declare that the following is a full, clear, and exact `description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part 'of this specification, in whichv Figure lis an elevation of one side of a roller-` mill, showing the drive, vthe adjusting devices for the grinding-rolls being omitted. Fig. 2 is a similar view showing the reverse side of the mill and the other drive. Fig. 3is an end elevation of the saine, vrshowing the belt-tightening pulley. Fig. 4 is an enlarged side elevation, partly broken away, of a yroller-mill, showing the adjusting mechanisms 'for the grinding-rolls. Fig. 5is a vertical transverse part section of Fig. 4, taken on line x .ethereon. Fig. 6 is an enlarged horizontal sectional detail taken on line y y, Fig. 4. Fig. 7 is a similar section taken on linea z of Fig. 4. Fig. 8 is a detail. A f y My invention has for its objects, first, to so arrange the two belts on one side "of the machine with relation to the belt-tighener on the side of the roller-'mill that the said two belts will converge until both impinge against the belt-tightener on their slack sides, thus ena- Ybling both to be simultaneously tightened or Aarrangement of parts, hereinafter more fully Set forth and claimed. n

Referring to the accompanying drawings,A

y designates the main frame of afour-roller mill,

upon which are made the fixed bearings for the inner roll of each pair.. The said rolls are designated by B B', respectively, and the journalbearings of the rolls B B have inclined faces, and their caps are inclined at the same angle, preferably of about forty-five degrecs.

c ively.

C Cyare the outer rolls, which correspond to and form pairs ywith the rolls B B', respect- 'Ihe rolls C C' are not journaled in the main frame, but in bearing-blocks, hereinafter described. l

j Vvc and b are pulleys on the extended ends of the journals of the rolls C and B', respectively.

' D is the main belt,whic11 passes around the driving-pulley on a driving-shaft. (Not shown in the drawings.) The belt D passes over the pulley b', then down under thepulley d'upon the transverse countershaft D', journaled in the main frame. The belt runs thence up and over the pulley c, whence it descendsto the driving-pulley.

y E is a belt-tightening device similar tov that shown in my application filed April 21, 1886, and numberedserially 199,675.

F F are two similar pulleys of equal size on the extended end of the shaft D on the side opposite the pulley d'.

rfis a belt running around the pulley F and a pulley, b, on the extended journal of roll B.

f' is a belt running around the pulley F' and a pulley, c', on the extended journal of roll C'.

G is abelt-tightening pulley having its shaft journaled in a bifurcated bracket, g, the arm of which is pivoted upon the mainframe, as shown in Fig. 3. The face of the said pulley impinges upon both belts f f and the bracket .f

is moved bythe threaded rod g', so as to regulate the pressure of the pulley G fupon said The belt f, it will be noticed, -runs from the pulley F tothe pulley b in an inclined direction, and the belt f runs from the pulley'F' to the pulley c' in an oppositely-inclined direction, so that the belts converge from the upper pulleys to the pulleys F F', and their slack sides convergefrom saidl 'upper pulleys to their points of impingement upon the peir riphery of .the pulley G. Thus the latter pulleywill simultaneously either tighten or loosen the belts. The pulley Gis made of suf iicient width to bear upon both belts.

The above is the description of the actuat ing mechanism of the mill.

The followingis the description of the means by which the movable rolls are adj usted in relation to the stationary rolls. `Each of the movable rolls. being actuated by a similar mechanism, the description of one of said mechanisms only is necessary. The roll C has its shaft journaled in bearings hh, made on the bearing-blocks H, Figs. 4 and 5, one of which supports each journal of the rolloutside of the main frame. Each bearing-block H has pivoted in a bifurcation on its lower side afriction-roller, h, which rests upon the periphery of a cam-disk, I, having the projecting portion i, the `edge of which is made on the are of a circle concentric with the periphery of the remaining portion of the disk. The cam-disk I is secured upon a transverse shaft, i', which passes through slotted openings in the sides of the main frame and has bearings in rectangular bearing-blocks i2, which have vertical motion between the two guide-ribs fia ia, secured to the outer surface of the main frame. Each bearing-block has a conical projection, h2, standing inward from the bifurcated portion on its under side,which has a lat end that impinges against the side of the main frame and prevents the bearingblocks from vibrating laterally. The bearing-block i2 on each side rests upon an eccentric disk, J, secured upon a shaft, j, passing through a slotted opening in the side of the main frameand turning in bearing-blocks K, which each rest upon the point of an adjustingscrew, k. The said screw passes through a threaded opening in a projection orbraeket, k', secured to the main frame, as shown in Figs. 4 and 5. By means of the screws k either or both ends of the shaftj may be raised or lowered, and by means of the eccentric disks J the cam-disks I and friction-rollers h can be raised or lowered, thereby similarly moving the bearing-blocks H, and with them the adjustable roll, as is evident.

The bearing-blocks K K are attached to the sides of the main frame by means of the plates K', having the slots k2 and the screws k3, passing through said slots, so that they can be adj usted vertically.

L L are levers having their hubs secured by set-screws Z upon the ends of the shaft t" outside of the cam-disks I. The said levers are so situated on their respective shafts z" at each end of the machine that they will come adjacent to and be operated by the right hand of the, person operating the machine.

M M are levers having their hubs secured by set-screws m upon the ends of the shafts j, and so situated that the operator of the machine will pull them with the left hand.y By turning the lever M on one end of the machine the corresponding adjustable roll can,by means of the eccentric disks J, he moved up to or from the stationary roll of the same pair, and

stationary roll. By means of the screws k the shafts j are raised,and, as hereinbefore described, the adjustable roll is made parallel with the stationary roll.

Each bearing-block H has a projection, m', standing outward from its periphery,and upon said projection is pivoted the flattened inner end of a bolt, N,which passes through an opening, n, in a part, n,of the main frame, and has a nut, n2, engaging its threaded outer end. The opening n has a diameter sufficiently larger than that of the holtN to allow thelatter to turn up and down therein. By means of the said bolt and nut the bearing-block on one side, and consequently the adjustable roll,can be moved outward from the stationary roll, so as to give more clearance between said rolls. The side of the nut n which rests against the part n" of the main frame is rounded, so as to allow the bolt N to turn up and down or rock in the opening, and thus accommodate itself to the motion of the bearingblock H.

O is a bolt passing through an opening, o, in the part n of the main frame at a point a suitable distance below the opening n, and o is a nut which engages the stem of said bolt on the inner side of the opening o.

P is a washer on the bolt O, andp isa coiled spring surrounding the inner end of the bolt O, and with its outer end bearing against the said washer and its inner end bearing against the inner end of the adjacent block H. The washer l? also has its surface that rests against the uut o rounded for the same purpose as the nut n?.

Q Q are screw-arms passing th rough th readed openingsin the lever-arms M.` The point of each of the said screws bears upon the projection q, or an outstanding part of the main frame, and each screw hasupon it a jam-nut, j which holds it in place in the lever.

R R are rectangular plates attached to the sides of the main frame. Each of the said plates stands outside of one of the bearing blocks H, at the lower part of the latter, so as to hold the block in placeupon the frame. Each plateR is provided with inwardly-standing lugs r2,which keep the roll-journals vertical,and with the longitudinal slots r, by means of which and the bolts r the position of the plate is adjusted, the bolts passing through said slots and engaging in threaded recesses in the main frame, or in brackets secured thereto, Figs. 4 and '6.

It is evident from the foregoing that by means of the screws k,the intervening shafts, cam-disks, and eccentric disks, the lower or adjustable roll can be paralleled with the stationary roll; that by means of the eccentric disks the movable or adjustable roll can be adj usted near to or farther from the station; ary roll; that by means of the cam-disks the adjustable roll can be dropped down so as not to engage in the grinding with the stationary roll; that by means of the springs and attachments the adjustable roll is kept up to the stationary roll, and can move away from the IIC latter should any large or hard substance fall between the rolls, and that by means of the bolts attached to thebearing-blocks -H the adjustable roll is moved outward from the stationary roll. It is also evident that the different parts of the mechanism will readily adjust themselves to the bearing-blocks H, as the various bolts have sufficient clearance at the points where they pass through the openings in the main frame.

Having described my invention, I claim-` the main frame and driven by the main belt at one end, endless beltsff, unequal in length, connecting said counter-shaft at its other end with rolls B G, and a belt-tightening pulley located outside of belts f f', and adapted t0 be engaged against the outer portion of one belt and the inner portion of the other belt,

. whereby both beltsV can be tightened 4simultaneously, or to be entirely released from the belts, substantially as and for the purpose specied. l

2. Thecombination of the four rolls, a counter-shaft having two pulleys on the same end thereof, the pulleys on the journals of one rol'l of each pair of rolls, the belts ff', of unequal length ,converging from the pulleys on the roll-` journals to the pulleys on the countershaft, with the idler-pulley journaled in a bifurcated bracket pivotedy on the main frame to one side of the belts and countershaft-,and the adjusting screw-rod, whereby the bracket can be shifted to cause the idler-pulley to impinge against the adjoining sides of the belts at one point ofits periphery and regulate the tension of both belts simultaneously, substantially as and for the purpose described.

3. The combination of the counter-shaft proyided with a pulley at one end rotated by the main driving-belt, the two equal-sized pulleys on the other end of the counter-shaft, the two pairs of rolls, the two equal-sized pulleys,one on the end of anadjustable roll of one pair of Vrolls and the other on the adjacent end of the stationary roll of the other pair, the belts f f', of unequal length, actuating each of said pulleys from one of the pair of pulleys on the counter-shaft, with the belt-tightening device comprising a bracket, g, pivoted to the main frame on the side of and below the larger belt,

5 5 f the idler-pulley G, and the adjusting screwrod g', engaging said bracket and an arm of the main frame, and adapted to adjust the bracket and cause the idlerpulley G to impinge against the slack outer portion of belt 6o f and against the slack inner portion of belt fat thesame point of its periphery, whereby v` the adjustable r oll, the bearing-blocks for the adjustable roll, the friction-rollers journaled in said bearing-blocks, blocks sliding vertically` v on the main framethe cam-disks with their peripheries bearing on the peripheries of said rollers, shafts carrying said cam-disks and journaled in said blocks, and a lever-handle secured to said shaft, whereby the cam-disks can be partially rotated to raise or lower the adjustable roll, all substantially as specified..

5. In a roller-mill, the combination of the stationary roll, .the adjustable roll, the bearing`blocks for the latter, the friction-rollers j ournaled in said blocks, the vertically-sliding cam-disks and leverhandle on the shaft there# of, the eccentric disks supporting the camdisks,and the lever-handle on the shafts of the eccentric disks, whereby the same can be ro-` tated to raise or lowerfthe can1disks,and consequently the adjustable roll, all substantially as specified. c

6.In a roller-mill,the combination of the; stationary roll, the adjustable roll, the bearing-blocks for the latter, thel friction-rollers journaled in said blocks, the vertically-sliding cam-disks and lever-handles on the shaft thereof, the eccentric disks and lever-handleon the shaft thereof, the brackets lc', securcdto the main frame, and the vertical adj usting-screws passing through threaded openings in said brackets, and with their ends impinging upon and supporting the bearings of the shaft of the eccentric disks, whereby the adjustable roll i can'be brought parallel to the stationary rollv by turning the said vertical screws, all 'substantially as set forth.- y

l7. Thecombination of the main frame hav ing an arm, n,the stationary roll, the adjustable roll, the bearing-blocks having projections extending out from their peripheries, the bolts having their inner ends pivoted to said projections and engaging with arm n', the adj usting-nuts on said bolts, andthe springs bearing against the bearing-blocks and the arm a IOO 1ro l and their adjusting-nuts, the whole, arranged f to operate substantially to adjust the rolls.

In testimony that I claim the foregoing as my own I afx my signaturein presence of two wit# nesses. j y HEMAN'A. BARNARD.

Witnesses:

W. H. HILLHoUsE, J. S'. LEAs. 

